A vapor recovery unit (VRU) is a device used for recovery of vapors such as gasoline, natural gas, and other fuels so that they can reused for industrial applications. Vapor recovery units are majorly used in upstream and downstream processes in chemical process industry. Vapor recovery unit uses different methods such as condensation, absorption, adsorption, and membrane separation for vapor recovery. In condensation process, vapors are condensed by lowering temperature. Furthermore, in the U.S., the Environmental Protection Agency (EPA) mandates operators to carry out vapor removal process to control harmful air emissions in natural gas processing plants, natural gas wells, and hydrocarbon storage facilities.